CN201358732Y - Low stress and high anti-torque double-ended threaded drill stem joint - Google Patents
Low stress and high anti-torque double-ended threaded drill stem joint Download PDFInfo
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- CN201358732Y CN201358732Y CNU2008201559499U CN200820155949U CN201358732Y CN 201358732 Y CN201358732 Y CN 201358732Y CN U2008201559499 U CNU2008201559499 U CN U2008201559499U CN 200820155949 U CN200820155949 U CN 200820155949U CN 201358732 Y CN201358732 Y CN 201358732Y
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Abstract
The utility model relates to a drill stem joint used in the drilling process in an oil well or a gas well, in particular to a low stress and high anti-torque double-ended threaded drill stem joint. The drill stem joint consists of a low stress and high anti-torque double-ended internal threaded drill stem joint and a double-ended external threaded drill stem joint; wherein the double-ended internal threaded drill stem joint is provided with No.1internal thread and No.2 internal thread which have the same rotation direction, tapered degree and thread parameter, but thread starting points and ending points of the No.1 internal thread and the No.2 internal thread are respectively opposite to each other at 180 degrees; and the double-ended external threaded drill stem joint is provided with No.1 external thread and No.2 external thread which have the same rotation direction, tapered degree and thread parameter, but thread starting points and ending points of the No.1 external thread and the No.2 external thread are respectively opposite to each other at 180 degrees. The low stress and high anti-torque double-ended threaded drill stem joint has lower stress concentration property and higher torque property, thereby, higher production efficiency is realized.
Description
Technical field
The utility model relates to the tool joint of using in the drilling process of oil well or gas well, the tool joint of the high torque resistant double thread of particularly a kind of low stress.
Background technology
The general API standard production that adopt American Petroleum Institute (API) (API) to formulate of the tool joint of using in the drilling process of oil well or gas well are made more.American Petroleum Institute (API) (API) begins to adopt the joint of petroleum drill rod of V-0.065 tooth form screw thread in the twenties in 20th century, the screw thread of this tool joint is a triangular thread, at the bottom of its tooth and crest all be flat, at the bottom of the tooth and crest wide all be 0.065 inch (1.651mm), transition wedge angle radius at the bottom of the flat tooth and between the tooth bearing surface has only r=0.38mm, stress is concentrated very high herein, fatigue crack very easily occurs, and the tool joint life-span is very short.At the bottom of the flat tooth of American Petroleum Institute's sixties in 20th century, change the round bottom of radius R=0.038 inch (0.965mm) into V-0.065 tooth form screw thread, stress at the bottom of the tooth is concentrated significantly and is reduced, tool joint is doubled and redoubled fatigue life, this screw thread is called as numeric type (NC) screw thread, can exchange fully with V-0.065 tooth form screw thread, its tooth form is included among the APISPEC 7, is called V-0.038R.But still there are some problems in numeric type (NC) screw thread in application, particularly still has bigger stress to concentrate in Bottom of Thread, and stress is at the skewness of Bottom of Thread, at the bottom of tooth near ridge bearing surface place stress maximum; Load is respectively enclosed maldistribution on the ridge in tool joint, most of load is gnawed at last by the male connection screw thread and is closed district (LET) ridge and bear, the load maximum born of first tooth wherein, the load that first tooth is born is approximately 30% of full payload, and the fatigue crack majority of tool joint is to be created in screw thread to gnaw the ridge root that closes the district at last.And the rear end of the female adapter of API tool joint is inclined-plane in, and the front end of corresponding male connection is an outer inclined-plane, has only the rear end face of a torque resistant shoulder in the male connection of the front end face of female adapter and correspondence, and the joint torsion strength is low.According to the design of API standard, the torsion strength of above-mentioned joint is generally 80% of body, can occur failure accidents such as bloated button of female adapter and the fracture of male connection screw thread when therefore above-mentioned joint in use runs into excessive torque.Drilling depth has reached 3000～6000M at present in addition, drilling rod a 8～10M, only the nipple assembling just needs 300～750 times, about 2～3 days, if the extra increase of each nipple assembling 1 minute, then just need have more 6～12 hours, labour cost, equipment rent will increase like this, cause cost to increase.Adopt multiple thread, add coarse pitch, it is few more to assemble required revolution, and assembling speed is fast more, and production efficiency is high more.Therefore need to develop the double thread tool joint that stress concentration, high torque resistant characteristic is arranged, can realize higher production efficiency.
Summary of the invention
The utility model has solved in the above-mentioned Petroleum Production prior art NC style connection thread that bigger stress is concentrated, joint torque resistant poor-performing, and the technical problem that production efficiency is lower provides the tool joint of the high torque resistant double thread of a kind of low stress.
For achieving the above object, the utility model is achieved in that
The tool joint of the high torque resistant double thread of a kind of low stress is made up of the double end tool joint box and the double end tool joint pin of the high torque resistant of a pair of low stress, it is characterized in that:
Described double end tool joint box has two and identical rotation direction, identical tapering, identical thread parameter is arranged but all relative 1# internal thread and the 2# internal thread that is 180 ° with terminating point of both screw thread starting points, double end internal thread two ends are provided with main torque resistant shoulder and secondary torque resistant shoulder, its secondary torque resistant shoulder root fillet≤± 2mm;
Described double end tool joint pin has two and identical rotation direction, identical tapering, identical thread parameter is arranged but all relative 1# external screw thread and the 2# external screw thread that is 180 ° with terminating point of both screw thread starting points, double end external screw thread two ends are provided with main torque resistant shoulder and secondary torque resistant shoulder, its main torque resistant shoulder root fillet≤± 2mm.
The tool joint of the high torque resistant double thread of described low stress is characterized in that: double end internal thread that described correspondence screws and the externally threaded tapering of double end are 1: 10～1: 16.
The tool joint of the high torque resistant double thread of described low stress is characterized in that the 1# internal thread of described double end internal thread and the distance of facing mutually between the original triangle summit of 2# internal thread equal 1/2 of thread pitch P.
The tool joint of the high torque resistant double thread of described low stress is characterized in that: externally threaded 1# external screw thread of described double end and the externally threaded distance of facing mutually between the original triangle summit of 2# equal 1/2 of thread pitch P.
The tool joint of the high torque resistant double thread of described low stress is characterized in that:
The Bottom of Thread of described internal thread forms circular arc at the bottom of two teeth: the one, and at the tooth form load side, triangle oblique line Bottom of Thread arc radius is Rrn1; The one, import side at tooth form, near footpath in bottom of thread direction and the original triangle one spacing bn is arranged, this place and axis of thread vertical direction are an angle an, and an angle line Bottom of Thread arc radius is Rrn2;
Described externally threaded at the bottom of Bottom of Thread forms two teeth circular arc: the one, at the tooth form load side, triangle oblique line Bottom of Thread arc radius is Rrs1; The one, import side at tooth form, near footpath in bottom of thread direction and the original triangle one spacing bs is arranged, this place and axis of thread vertical direction are an angle as, and as angle line Bottom of Thread arc radius is Rrs2;
Wherein:
bn＝bs≤1mm；
an＝as≤6°；
Rrn1＝Rrs1≤2mm；
Rrn2＝Rrs2≤2mm；
Rrn1≤Rrn2。
The tool joint of the high torque resistant double thread of described low stress is characterized in that: the main torque resistant shoulder of described double end tool joint box setting closely contacts when tightening with the end of the main torque resistant shoulder of double end tool joint pin setting.
The tool joint of the high torque resistant double thread of described low stress is characterized in that there is one minim gap≤0.5mm the end of the secondary torque resistant shoulder of the secondary torque resistant shoulder of described double end tool joint box setting and the setting of double end tool joint pin when tightening.
Compared with prior art, the beneficial effects of the utility model are: by circular arc screw thread at the bottom of the different two teeth of the form of thread with the API tool joint that adopts optimization, change the geometry and the size of ridge, make appropriate thread forms and specification and suitable in, in the male connection, external diameter cooperates, in increasing the ridge flexibility effectively and reducing, male connection flexibility sum, load is distributed between each circle of screw thread and is tending towards even when making tool joint bear plus load, obviously reducing the stress of Bottom of Thread concentrates, improve the fatigue life of screw thread, guarantee the reliable connection of tool joint at the screw thread place; The outer inclined-plane that changes the front end of interior shoulder, corresponding male connection by the interior inclined-plane with the rear end of the female adapter of API tool joint into changes the end face that is mated into, increase a secondary torque resistant shoulder, when main torque resistant shoulder bore plus load and deforms, interior circular bead surface effectively contact improved the torsional strength of joint with this; The optimal design of the root fillet of main torque resistant shoulder and secondary torque resistant shoulder reduces the stress of shoulder root effectively to be concentrated, and improves the fatigue life of joint; By adopting the high torque resistant tool joint of double end low stress screw thread, can effectively save the shackle time, reduced cost of production, effectively reduce joint stress simultaneously and concentrate, improved torsional strength.
Description of drawings
Fig. 1 is a double thread tooth form structural representation of the present utility model;
Fig. 2 is a female adapter sectional drawing of the present utility model;
Fig. 3 is a male connection outside drawing of the present utility model;
The specific embodiment
Tool joint is illustrated to the high torque resistant double thread of low stress of the present utility model in conjunction with the accompanying drawings.
As shown in Figure 1-Figure 3, the tool joint of the high torque resistant double thread of this kind low stress, it comprises the double end tool joint box and the double end tool joint pin of the high torque resistant of a pair of low stress:
The double end tool joint box has 1# internal thread 7 and the 2# internal thread 9 different with the form of thread of API tool joint, both form of thread structures of 1# internal thread 7 and 2# internal thread 9 are identical, comprise that rotation direction is identical, tapering was all 1: 10～1: 16 mutually, thread parameter is identical, they both have a circular arc Bottom of Thread at the bottom of identical two teeth, at the tooth form load side triangle oblique line Bottom of Thread arc radius Rrn1 and Rrn1≤2mm are arranged, import side at tooth form footpath spacing bn and bn≤1mm in close bottom of thread direction and the original triangle are arranged, this place and axis of thread vertical direction are angle an and an≤6 °, an angle line Bottom of Thread arc radius Rrn2 and Rrn2≤2mm, Rrn1≤Rrn2 simultaneously; Their both distances of facing mutually between the original triangle summit equal 1/2 of single thread pitch P, and their both screw thread starting points are all relative with terminating point to be 180 °; The 1# internal thread 7 of double end tool joint box and 2# internal thread 9 two ends are provided with main torque resistant shoulder 1 and secondary torque resistant shoulder 15, between the head bore hole portion 3 of the 1# internal thread 7 of double end tool joint box and 2# internal thread 9 and double end tool joint box an inclined-plane 5 are arranged; Between the secondary torque resistant shoulder 15 of the root sleeve portion 11 of double end tool joint box and its root its secondary torque resistant shoulder root fillet 13 is arranged, this fillet≤± 2mm.
The double end tool joint pin has 1# internal thread 7 and 2# internal thread 9 corresponding 1# external screw thread 8 that screws and the 2# external screw threads 10 with the double end tool joint box, both form of thread structures of 1# external screw thread 8 and 2# external screw thread 10 are identical, comprise that rotation direction is identical, tapering be all mutually 1: 10～1: 16 and≤tapering of 1# internal thread 7 and 2# internal thread 9, thread parameter is identical, they both have a circular arc Bottom of Thread at the bottom of identical two teeth, at the tooth form load side triangle oblique line Bottom of Thread arc radius Rrs1 and Rrs1=Rrn1 are arranged, import side at tooth form footpath spacing bs and bs=bn in close bottom of thread direction and the original triangle are arranged, this place and axis of thread vertical direction are angle as and as=an, as angle line Bottom of Thread arc radius Rrs2 and Rrs2=Rrn2; Their both distances of facing mutually between the original triangle summit equal 1/2 of single thread pitch P, and their both screw thread starting points are all relative with terminating point to be 180 °; The 1# external screw thread 8 of double end tool joint pin and 2# external screw thread 10 two ends are provided with main torque resistant shoulder 2 and secondary torque resistant shoulder 14, and an inclined-plane 6 is arranged between the front end head 12 of the 1# external screw thread 8 of double end tool joint pin and 2# external screw thread 10 and double end tool joint pin; One its main torque resistant shoulder root fillet 16 is arranged between the root base portion 4 of double end tool joint pin and its root master torque resistant shoulder 2, this fillet≤± 2mm.
The double end tool joint box of the high torque resistant double thread of low stress tool joint is connected when tightening with double end tool joint pin screw-in, the main torque resistant shoulder 1 of double end tool joint box closely contacts with main torque resistant shoulder 2 ends of double end tool joint pin, and there is a minim gap the secondary torque resistant shoulder 15 of double end tool joint box and secondary torque resistant shoulder 14 ends of double end tool joint pin, this gap≤0.5mm; The diameter of the root base portion 4 of the diameter＞double end tool joint pin of the length of the root base portion 4 of the length＞double end tool joint pin of the head bore hole portion 3 of double end tool joint box and the head bore hole portion 3 of double end tool joint box; The diameter of the front end head 12 of the diameter＞double end tool joint pin of the root sleeve portion 11 of the length of the front end head 12 of the length of the root sleeve portion 11 of double end tool joint box＜double end tool joint pin but double end tool joint box, to guarantee that main torque resistant shoulder 1,2 and secondary torque resistant shoulder 14,15 closely contacts cooperation, the high torque resistant performance of assurance tool joint when bearing plus load and deform.
Embodiment:
The external diameter of this double thread tool joint is
Internal diameter is
Its 1# internal thread, the 2# internal thread, the 1# external screw thread, the externally threaded tapering of 2# all is 1: 12, the 1# internal thread, the 2# internal thread, the 1# external screw thread, the externally threaded pitch P of 2# all is 16.934mm, the 1# internal thread, the 2# internal thread, the 1# external screw thread, at the bottom of the externally threaded tooth of 2# and crest wide all be 2.513mm, the 1# internal thread, the radius of rounded root Rrn1 of 2# internal thread equals the 1# external screw thread, the externally threaded radius of rounded root Rrs1 of 2# is R1.321mm, the 1# internal thread, the tooth form of 2# internal thread imports side and equals the 1# external screw thread near footpath spacing bn in bottom of thread direction and the original triangle, it all is 0.263mm near footpath spacing bs in bottom of thread direction and the original triangle that the externally threaded tooth form of 2# imports side, the 1# internal thread, the 2# internal thread equal the 1# external screw thread with axis of thread vertical direction angle an, 2# externally threaded with axis of thread vertical direction angle as all be 5 °, the 1# internal thread, the radius of rounded root Rrn2 of 2# internal thread equals the 1# external screw thread, the externally threaded radius of rounded root Rrs2 of 2# is R1.524mm, the 1# internal thread, the screw thread starting point of 2# internal thread is all relative with terminating point to be 180 °, the 1# external screw thread, the externally threaded screw thread starting point of 2# is all relative with terminating point to be 180 °, the root fillet of main torque resistant shoulder and secondary torque resistant shoulder all is 1.5mm, and gap when tightening, secondary torque resistant shoulder end equals 0.2mm.
Being preferred embodiment of the present utility model only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be technology category of the present utility model.
Claims (7)
1, the high torque resistant double thread of a kind of low stress tool joint is made up of the double end tool joint box and the double end tool joint pin of the high torque resistant of a pair of low stress, it is characterized in that:
Described double end tool joint box has two and identical rotation direction, identical tapering, identical thread parameter is arranged but all relative 1# internal thread and the 2# internal thread that is 180 ° with terminating point of both screw thread starting points, double end internal thread two ends are provided with main torque resistant shoulder and secondary torque resistant shoulder, its secondary torque resistant shoulder root fillet≤± 2mm;
Described double end tool joint pin has two and identical rotation direction, identical tapering, identical thread parameter is arranged but all relative 1# external screw thread and the 2# external screw thread that is 180 ° with terminating point of both screw thread starting points, double end external screw thread two ends are provided with main torque resistant shoulder and secondary torque resistant shoulder, its main torque resistant shoulder root fillet≤± 2mm.
2, the high torque resistant double thread of low stress according to claim 1 tool joint is characterized in that: double end internal thread that described correspondence screws and the externally threaded tapering of double end are 1: 10～1: 16.
3, the high torque resistant double thread of low stress according to claim 1 tool joint is characterized in that the 1# internal thread of described double end internal thread and the distance of facing mutually between the original triangle summit of 2# internal thread equal 1/2 of thread pitch P.
4, the high torque resistant double thread of low stress according to claim 1 tool joint is characterized in that: externally threaded 1# external screw thread of described double end and the externally threaded distance of facing mutually between the original triangle summit of 2# equal 1/2 of thread pitch P.
5, the high torque resistant double thread of low stress according to claim 1 tool joint is characterized in that:
The Bottom of Thread of described internal thread forms circular arc at the bottom of two teeth: the one, and at the tooth form load side, triangle oblique line Bottom of Thread arc radius is Rrn1; The one, import side at tooth form, near footpath in bottom of thread direction and the original triangle one spacing bn is arranged, this place and axis of thread vertical direction are an angle an, and an angle line Bottom of Thread arc radius is Rrn2;
Described externally threaded at the bottom of Bottom of Thread forms two teeth circular arc: the one, at the tooth form load side, triangle oblique line Bottom of Thread arc radius is Rrs1; The one, import side at tooth form, near footpath in bottom of thread direction and the original triangle one spacing bs is arranged, this place and axis of thread vertical direction are an angle as, and as angle line Bottom of Thread arc radius is Rrs2;
Wherein:
bn＝bs≤1mm；
an＝as≤6°；
Rrn1＝Rrs1≤2mm；
Rrn2＝Rrs2≤2mm；
Rrn1≤Rrn2。
6, the high torque resistant double thread of low stress according to claim 1 tool joint is characterized in that: the main torque resistant shoulder of described double end tool joint box setting closely contacts when tightening with the end of the main torque resistant shoulder of double end tool joint pin setting.
7, the high torque resistant double thread of low stress according to claim 1 tool joint is characterized in that there is one minim gap≤0.5mm the end of the secondary torque resistant shoulder of the secondary torque resistant shoulder of described double end tool joint box setting and the setting of double end tool joint pin when tightening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201559499U CN201358732Y (en) | 2008-11-26 | 2008-11-26 | Low stress and high anti-torque double-ended threaded drill stem joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201559499U CN201358732Y (en) | 2008-11-26 | 2008-11-26 | Low stress and high anti-torque double-ended threaded drill stem joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201358732Y true CN201358732Y (en) | 2009-12-09 |
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|---|---|---|---|
| CNU2008201559499U Expired - Lifetime CN201358732Y (en) | 2008-11-26 | 2008-11-26 | Low stress and high anti-torque double-ended threaded drill stem joint |
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Cited By (13)
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| CN103015913A (en) * | 2012-12-25 | 2013-04-03 | 江苏和信石油机械有限公司 | Exploration drill rod thread structure with 12-3/4-inch ultra-large caliber |
| CN103032031A (en) * | 2012-12-25 | 2013-04-10 | 江苏和信石油机械有限公司 | 14-3/4-inch extra-large-caliber prospecting drill rod thread structure |
| CN103216197A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Fast-rotation type oil drill rod joint thread reinforcing structure |
| CN104769210A (en) * | 2012-09-13 | 2015-07-08 | 朗伊尔特姆公司 | Drill string component with multiple threaded joints |
| CN105735912A (en) * | 2016-05-16 | 2016-07-06 | 陕西太合科技有限公司 | Tool joint linkage structure with different matching tapers |
| CN106457424A (en) * | 2014-05-05 | 2017-02-22 | 肯纳金属公司 | Cutting head with improved connection |
| CN106837972A (en) * | 2017-01-11 | 2017-06-13 | 中国科学院合肥物质科学研究院 | A kind of hyperbolicity radius tooth bottom external screw thread |
| CN109475373A (en) * | 2016-07-21 | 2019-03-15 | 蛇牌股份公司 | Pedicle screw system including locking screw with threaded cutout |
| US10364618B2 (en) | 2011-01-26 | 2019-07-30 | Bly Ip Inc. | Drill string components resistant to jamming |
| EP3141689B1 (en) | 2015-09-11 | 2019-12-04 | Sysbohr GmbH Bohrtechnik für den Spezialtiefbau | Threaded connection and drilling rod having a threaded connection |
| US10557316B2 (en) | 2011-01-26 | 2020-02-11 | Bly Ip Inc. | Drill string components having multiple-thread joints |
| US10570676B2 (en) | 2011-01-26 | 2020-02-25 | Bly Ip Inc. | Drill string components having multiple-thread joints |
| US10646936B2 (en) | 2014-04-17 | 2020-05-12 | Kennametal Inc. | Machining tool and method for manufacturing a machining tool |
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2008
- 2008-11-26 CN CNU2008201559499U patent/CN201358732Y/en not_active Expired - Lifetime
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| US10570676B2 (en) | 2011-01-26 | 2020-02-25 | Bly Ip Inc. | Drill string components having multiple-thread joints |
| US11898404B2 (en) | 2011-01-26 | 2024-02-13 | Boart Longyear Company | Drill string components having multiple-thread joints |
| US10364618B2 (en) | 2011-01-26 | 2019-07-30 | Bly Ip Inc. | Drill string components resistant to jamming |
| US10557316B2 (en) | 2011-01-26 | 2020-02-11 | Bly Ip Inc. | Drill string components having multiple-thread joints |
| CN104769210A (en) * | 2012-09-13 | 2015-07-08 | 朗伊尔特姆公司 | Drill string component with multiple threaded joints |
| CN104769210B (en) * | 2012-09-13 | 2018-09-21 | 朗伊尔特姆公司 | Drill string component with multiple threaded joints |
| CN103032031A (en) * | 2012-12-25 | 2013-04-10 | 江苏和信石油机械有限公司 | 14-3/4-inch extra-large-caliber prospecting drill rod thread structure |
| CN103015913A (en) * | 2012-12-25 | 2013-04-03 | 江苏和信石油机械有限公司 | Exploration drill rod thread structure with 12-3/4-inch ultra-large caliber |
| CN103216197A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Fast-rotation type oil drill rod joint thread reinforcing structure |
| US10646936B2 (en) | 2014-04-17 | 2020-05-12 | Kennametal Inc. | Machining tool and method for manufacturing a machining tool |
| CN106457424A (en) * | 2014-05-05 | 2017-02-22 | 肯纳金属公司 | Cutting head with improved connection |
| EP3141689B1 (en) | 2015-09-11 | 2019-12-04 | Sysbohr GmbH Bohrtechnik für den Spezialtiefbau | Threaded connection and drilling rod having a threaded connection |
| CN105735912A (en) * | 2016-05-16 | 2016-07-06 | 陕西太合科技有限公司 | Tool joint linkage structure with different matching tapers |
| CN109475373A (en) * | 2016-07-21 | 2019-03-15 | 蛇牌股份公司 | Pedicle screw system including locking screw with threaded cutout |
| CN109475373B (en) * | 2016-07-21 | 2021-10-26 | 蛇牌股份公司 | Pedicle screw system comprising a locking screw with a threaded cut |
| CN106837972A (en) * | 2017-01-11 | 2017-06-13 | 中国科学院合肥物质科学研究院 | A kind of hyperbolicity radius tooth bottom external screw thread |
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